from the moment they sat down to talk with cbs' news "60 minutes," president obama and secretary clinton, seem like they've been the best of friends for decades. >> i just wanted to have a chance to publicly say thank you because i think hillary will go down as one of the finest secretary of states we had. i'm going to miss her. wish he was sticking around. hillary's been one of the most important advisers i've had on a whole range of issues. >> reporter: how did they heal the wounds from their intense rivalry? during that highly contentious 2008 primary fight. >> i can't tell who i'm running against. >> we're just getting warmed up. >> ancient history because of the people we are. also, we're professionals. >> reporter: the interview will clearly leave many wondering, was this the endorsement of a 2016 presidential run? >> i don't think either he or i can make predictions about what's going to happen tomorrow or the next year. >> clearly, the door is open for her. she's leaving the scene. she's not leaving politics. >> reporter: at least clinton's health doesn't seem to be a factor. ann